Questions regarding password-based authentication and password management

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3
votes
3answers
115 views

How to mask passwords in 'watch' command?

I am using watch to monitor the progress of a MySQL replication slave. The way I have it set up now, the password shows up in the header of the watch output. I am not exceedingly worried that someone ...
3
votes
3answers
6k views

How to take 'password' like input in shell script? [duplicate]

Possible Duplicate: How to hide commands typed in a Linux shell? Reading passwords without showing on screen in Bash Scripts I would like to take a password as input, but I want user to ...
3
votes
2answers
438 views

Two ways to lock a password but only one to unlock

CentOS 6 Linux has two ways to lock a password: passwd -l usermod -L Today I found out, that they do something different. passwd writes two exclamation marks into the shadow file. # passwd -d ...
3
votes
2answers
2k views

Second field in /etc/shadow

If the second field of the /etc/shadow file is set to !!, does it mean that the account is disabled? Or does it mean that the account is active with no password assigned?
3
votes
3answers
234 views

Changing user password through GUI app

I was making a GUI application to manage users and groups in Linux! I'm done with the part where it creates a new user, but stuck with the part where it gives the newly created user a new password. ...
3
votes
2answers
337 views

How to Create a Encrypted Password

I want to know how can I create a encrypted password in Ubuntu 14.04 TLS. Tried this: makepasswd --crypt-md5 password_here Did not worked for me throwing this Error sysadmin@localhost:~$ ...
3
votes
1answer
324 views

sudo command executes without prompting for password

For some reason, I suddenly do not need to enter the password when issuing sudo some_cmd. Entered command just runs without ever prompting password, even if I am not logged in as user root. Commands ...
3
votes
3answers
843 views

Encrypt a password the same way mysql does

I've created a user ... but forgotten the password mysql> create user 'blayo'@'%' identified by 'right'; Which Linux command line tool can encrypt the password the same way mysql 5.5 does ? ...
3
votes
4answers
1k views

Why can't I echo the password to fetchmail?

I'm trying to configure a fetchmail. Before I deal with the syntax of fetchmailrc ( I discovered that the level of bugginess of a problem is synergistic with the number of different aspects of the ...
3
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2answers
3k views

Ubuntu password policy

I want to set the system-wide password policy on an Ubuntu 12.04 LTS server. Googling around, a lot of people point to this (very old) document: ...
3
votes
2answers
560 views

How to make a folder request root password to view execute?

I am running Ubuntu 10.04 LTS. I want to use my laptop to play music in a party. MY screensaver does not need a password to deactivate. I would like to allow people to use my computer to play the ...
3
votes
2answers
722 views

Is Open LDAP meant to work with the passwd command for Linux?

I've implemented an Open LDAP server in OpenSuSE 11.2 via the YaST GUI. I'm having success logging in from the local machine and other machines via LDAP. I am able to change LDAP user passwords via ...
3
votes
3answers
825 views

Why does this password fail AIX and Solaris rules

Had to reset my password on a couple of client servers today, and despite following the rules I get the message "Your password failed to meet: minimum of 2 non-alphabetic characters" back from the ...
3
votes
2answers
59 views

Whose password should I enter?

Authentication is required to perform this action. Whose password should I enter? Mine? Root's? I can never tell. ...
3
votes
4answers
198 views

SSH asking for password after ssh-copy-id

I created a key on my machine with ssh-keygen. I copied the key to remote machine using ssh-copy-id. Tried to connect to remote machine but it asked me the password. Both machines are ubuntu (local ...
3
votes
4answers
1k views

passing passwords to a script

I want to scp a file to a remote host, and from there, run a command on the file, and exit the remote session. If I write a usual script, call scp and then ssh, I am prompted to enter two passwords. ...
3
votes
1answer
5k views

How to set password for users in AIX using single line command?

Is there any way in which I can set the password for a newly created user account in AIX in a one line command? I don't want to give any prompt to the user. If there is a command, it should set the ...
3
votes
1answer
1k views

Resetting password in Linux Mint when disk is encrypted

I have a system (VM, actually) with Linux Mint 15 on it. The disk is encrypted, but I remember that password -- just not the password for my account. I've tried changing the command in GRUB from ro ...
3
votes
1answer
288 views

How to disable timeout of password prompt for partition decryption during boot?

I have a computer running OpenSUSE 12.1, 64-bit, default install. How it works currently: I turn on the computer It goes through the boot process At some point during boot, I am asked for password ...
3
votes
1answer
777 views

Can pwgen output passwords of a certain length?

I'm using the command line tool pwgen to generate passwords because I love the repeatability you get with the sha1 command line flag. To quote the man page: -H, --sha1=/path/to/file[#seed] ...
3
votes
1answer
322 views

Is it a good idea to use pwsafe - a password manager not updated since 2005?

I'm looking for a command-line Linux password-manager. It appears that pwsafe is the program most commonly used. However, its latest update was in 2005. Is it a good idea to use this? Has it been so ...
3
votes
2answers
4k views

Avoid “Authentication token manipulation error” on password change

I'm implementing a security policy that will force the users to introduce stricter passwords when they change their own: The /etc/pam.d/passwd configuration file is: #%PAM-1.0 auth include ...
3
votes
1answer
1k views

Debian Log In Failure With Correct Password

So I have a Debian distro at home (considering getting ubuntu), and I can't login. When I use the correct password is does this thing where it makes it look like it's going to login, and then it ...
3
votes
2answers
292 views

Is it possible (and a good idea) to do `pw lock root` on FreeBSD?

I have set up sudo on my FreeBSD server. As I now never want to log in as root anymore, I was wondering whether I should do sudo pw lock root. My questions are: Is this possible, without forever ...
3
votes
1answer
725 views

Debian wake up from suspend password

I am using Debian Squeeze. When I suspend my laptop and wake it up again later, it doesn't ask for the system password. How do I fix this?
3
votes
2answers
30 views

How can I check GMail messages with prompt for password from a script?

I'm using zsh on Ubuntu 14.04 over SSH using Putty and I'm setting up the key bindings for my keyboard. Because zsh doesn't seem to make use of my function keys I thought I'd setup scripts to do ...
3
votes
2answers
31 views

Is it possible to change passwords temporarily?

I have a Linux system with several users. I don't know their passwords, nor do I want to know them. I have to do a batch copy of some of their directories over SSH, with their account and password. ...
3
votes
1answer
96 views

Solaris/OpenIndiana: Password for roles?

I've been gently experimenting with roles in Solaris, and wonder a bit about setting a password for it. I want the role I've created to be used by several users, so setting password to the same as ...
3
votes
1answer
1k views

Graphically ask for password in a bash script and retain default sudo timeout setting

The sudo -A (SUDO_ASKPASS) option apparently causes sudo to lose the timeout (e.g., timestamp_timeout) setting. I want to use the sudo -A option but I want to retain the default timeout (e.g., 15 ...
3
votes
1answer
285 views

Is it a bad idea to add myself to the sudo group?

Members of the sudo group in my Debian install can execute anything without entering a password. This is convenient, but seems like a bad idea. NOTE: My computer is an ordinary desktop, not a server ...
3
votes
1answer
244 views

Can linux use a mix of SHA-1 and CRYPT passwords?

We have an automated sync-routine that uses useradd to create new users on a Ubuntu 10.04 machine. The application launching the routine provided both username and CRYPT-encrypted password. However, ...
3
votes
1answer
2k views

Can I automate mounting a cifs share without storing my password in plaintext?

I currently use a script which contains commands along the lines of sudo /sbin/mount.cifs $SERVER_SHARE $MOUNT -o username=$DOMAIN_$USER,uid=$USER,gid=$USER,file_mode=0664,dir_mode=0775 to mount my ...
3
votes
2answers
6k views

Will a users password expire if I set the “maxexpired” to “-1”? [maxage not 0] - AIX

So under AIX 6, according to "lsuser" the user has the following settings: maxexpired=-1 maxage=2 So this means that 2 weeks after the last password update of the user the password will expire, but ...
3
votes
1answer
900 views

Why does a user get prompted for password under AIX?

Users get prompted for password, and according to the lsuser -f username output: expires=0 maxexpired=-1 maxage=13 users shouldn't be prompted for changing password. Why does he has a change ...
3
votes
1answer
691 views

Change default for Nautilus (file_manager) from “Forget password immediately”?

When opening a tab which needs to mount a Samba share, Nautilus 2.30.1 displays a window: Password required for share xxx on localhost Password: [ ] (*) Forget password immediately ( ) ...
3
votes
1answer
53 views

How to use my login password to do two things

I have a CIFS drive that I mount regularly, and it requires a password for it. Since it's annoying to type my password every time, I wrote a script that sets the PASSWD environment variable, mounts ...
3
votes
2answers
5k views

Change Password of a user in /etc/shadow

I would like to change the password of a user in the /etc/shadow. I can't use password changing programs like passwd. It must be done by editing the /etc/shadow. The /etc/shadow is on a mounted hard ...
3
votes
1answer
903 views

Ubuntu 14.04 login into desktop by single user mode

My OS is Ubuntu 14.04 64-bit, and kernel is 3.13.0-30-generic. I forget my user account password and now want to get into GUI desktop. I know from the Internet that we can reset password by single ...
3
votes
1answer
388 views

Why does pam_mount ask for password?

I used the pam-auth-update tool in order to enable some pam configuration profiles: PAM configuration PAM profiles to enable: [*] encfs encrypted home directories [*] Unix ...
3
votes
0answers
100 views

Restrict usage of the same password during a time period

I need to configure a server with some requisites on the password changing: in addition to other requisites, I need to ensure that, on a password change, it is not repeated (last 5 passwords) and ...
3
votes
3answers
2k views

Another account with same uid as root gets prompted to set new password for root, not itself

After upgrading the os from 5300-06 to 5300-11, this weird behaviour happened. My system had another unix account, let's call it "abc", purposely configured its uid to 0 for working as a root with ...
3
votes
0answers
414 views

ZIP password finders for Linux?

I'm trying to extract ZIP files for an encrypted archive I've forgotten the password for. So far I've found the tool fcrackzip which does what I want, but its own manpage states that it has numerous ...
2
votes
8answers
2k views

How to give a normal user permission to change root password

Please do not ask why, but is it possible to do it? p/s: I know it's not a good thing, let's just say someone from the top management who is computer illiterate want some sort of control over the ...
2
votes
2answers
328 views

Sudo Su automated login

I want to automate the login process with sudo su. I have seen lot of questions on these, but none of them are working for me. Automate login with sudo and su Here's my what I tried so far echo ...
2
votes
2answers
2k views

How to get hashed password in /etc/shadow using getpwnam()?

Apparently there is a function (getpwnam) that given a username, will return the appropriate entry in /etc/passwd with the other details for that user (shell, uid, gid, etc.). However, I have no idea ...
2
votes
4answers
1k views

Can separate unix accounts share a username but have separate passwords?

On unix systems, each separate user account has a unique username. Passwords, then, are not unique - every distinct user could have the same exact password. I want to do the converse. I want one ...
2
votes
2answers
246 views

show entered new password in unix “passwd” command

Is is possible to run the passwd command with an option to show the newly entered passwords? By default it doesn't show what I type and I don't want this. [dave@hal9000 ~]$ passwd Changing password ...
2
votes
3answers
433 views

Lost password for a user on a Linux Server: How reset it?

On a Server an user 16040 has lost his password. I have password for root but don't have password for user 16040. How can I reset his password? With passwd 16040, unix ask me current password that I ...
2
votes
2answers
337 views

How is using a public-key for logging in to SSH any better than using a password?

I'm not asking about password vs key authentication. I've seen a few times (and even Amazons AWS) says that even if SSH has a major vulnerability that key authentication would make such an exploit ...
2
votes
3answers
224 views

Do all Linux distro's use the same cryptographic hash function?

Do all Linux distro's use same Cryptographic hash function? If yes, is it provided with the kernel itself? EDIT:- I refer to the function mainly used for storing user login passwords.